Electric heating apparatus



Aug. 2, 1932. E. RUBl-Nl ET AL ELECTRIC HEATING APPARATUS Filed Dec, 5, 1930 2 Sheets-Sheet [n 013;, w iv' f 19 56M."

oooo 000000 0000000 000000000 000000000 000000900 000000000 000000000 00000000 0000000 000000 Aug. 2, 1932. E. RUBIN! ET AL 1,869,623

ELECTRIC HEATING APPARATUS Filed Dec. 5, 1950 2 Sheets-Sheet 2 MN ii =1- Patented Aug. 2, 1932 warren STATES PATENT or ELIG-IO RUB INI AND JOHN DE LAI, OF TORONTO, ONTARIO, CANADA ELECTRIC HEATING nrrAnArUs Application filed December 3; 1930. Serial No. 499,708.

The invention relates to improvements in electric heating apparatus as described in the present specification and shown in the accompanying drawings that form a part of the same.

One object of the invention is to provide an electrically operated furnace of simple construction, particularly adapted for domestic use and whereby the discomforts and dis- 1H advantages of heating apparatus employing oil, coal gas, or other form of fuel are displaced by the advantages of electrically generated heat. I y

A further object of the invention is to prolfi vide an electric furnace having a low currentconsumption and which may be readily controlled to provide the required degree of heat at the minimum ofcost. V g I I Another object is to provide an efficient circulatory system whereby clean air is fed to the heating chamber and passed on in an almost continuous flow to the outlet pipes and thence to the registers, thereby preventing stagnation of the heated air within the furnace and insuring the maximum flow of air to the rooms.

Another objectis the convenient arrangement of parts whereby access may be easily had tothe elements in the event of the desire to remove, or replace same.

A still further object is to provide simple and efficient apparatus which may he readily transformed into a ventilating means capable of supplying cool, fresh air to the rooms of a building during any period when heat'is not required.

And generally the objects of the invention areto provide an eflicient electric furnace, of few parts, which may be constructed at reasonable cost, and maintained at a minimum of expense.

The invention consists in the novel features of construction, arrangements and com- 4 binations described in the present specification and more particularly pointed out in the claims for novelty following.

In the drawings Figure 1 is a central vertical sectional View through our improved 5c electric furnace,

Figure 2 is a plan View of the structure shown in Figure Figure 3 is a cross sectional view taken on the line 3- 3 of Figure 1. v

Figure 4 is a cross sectional view taken on the line 44: of Figure 1. Figure 5 is a cross sectional view taken on the line 55 of Figure 1. I

Figure 6 is a cross sectional View taken on the line 6'6 of Figure 1.

Figure 7 is an enlarged horizontal sectional view through a portion of the furnace wall and the air regulator. V

Figure 8 is a vertical sectional View taken on the line 8'8 of Figure 7. t 65 Figure 9 is a side elevation, partly in vertical section, of a modified form of furnace.

Lilre numerals of reference indicate corresponding parts in the various figures; I F Referring to the drawings, A is the furnace which may be constructed of cast metal, or of any suitable material, and which is shown in the drawings as consisting of three sections, 1, 2 and 3 respectively, although ofcourse said furnace may be constructed in one. orin a pluralitv of sections without departing from the spirit of the invention. 7

The section '1 which constitutes the base is provided with an air inlet 4 in communi- 5. cation with the outlet 50f a fan casing 6 in which latter is mounted a fan 7, which fan may be driven'in any suitable manner driving means not being shown in the drawings as sameldoes not constitute a feature of the present invention) and is adapted to cause :a How of airvinto the air chamber formed within the section 1. y 7 v 7 Electric element sockets 8 are arranged at intervals around the inner circumference of the intermediate annular'section ,2 and con- 11 respectively, leading to a suitable switch,

1-1 or switches, the construction of which is not shown in the drawings as same may be 1150 of any suitable design to meet the requirements.

The top section 3 which fits over the section 2 is preferably concaved to provide an interiorly positioned inverted cone shaped deflecting wall 12 adapted to deflect the upwardly flowing current of air into the outlets 13 radially arranged in relation thereto and connecting with the pipes to the various rooms.

The section 3 is provided with a suitable door 14, preferably having a transparent insert 15 therein, said door being arranged at such an angle in relation to the furnace wall that the elements 9 can be seen therethrough and also that anyone wishing to remove, or replace, one or more of such elements can easily reach same through said door.

A hot water coil 16 may be positioned within the section 3 if so desired and provided with an outlet pipe 17 leading through the furnace wall.

The wall of the section 3 preferably carries a water container 18 iillable from the outer side of said wall and opening into the interior of the furnace to give the warm air the tie sired degree of humidity.

In order to lessen the force of the air reaching the heating elements and to effectually atomize said air an adjustable air filter is positioned Within the furnace between the air inlet 4 and the said elements, such filter comprising a perforated disc 19 permanently secured across the furnace and a sccondary'perforated disc, or plate 20 slidable over the first mentioned disc and according to the positions of said discs in relation to each othercontrolling the amount of air passing upwardly therethrough.

The horizontal movement-of the plate .20 is effected by means of a screw 21, threading through a bracket 22 carried by said plate and extending outwardly through the wall of the furnace and through a suitable bracket 23 secured on the outer wall of the furnace and preferably being provided with a knurled head 24. V a r A perforated disc 25 is also placed across the interior of the furnace above the heating elements so as to further break up the warm air before it enters the pipes, said disc 25 along with. the discs 19 and 20 also serving toretainthe heat therebetween and thereby provide a heating chamber having a perforated top and bottom. In Figure 9 a inodiiiedforn of construction is shown in which the air is forced by the fan into a pipe, or coil, 26 positioned within the furnace and is warmed in passing through said pipe before being emitted through a suitable outlet 27 into the body of the furnace for heating by the eleinents9.

It is preferable that the air admitted totlie furnace be clean, especially when the apparatus is being used as a ventilating medium and to this end a pipe leading from the outside of the building may be provided with a suitable fitting 28 adapted to be secured over the inlet to the fan.

In practice all of the elements 9 may be under the control of a single switch, or more than one switch may be employed, each controlling the desired numb-er of elements so that the number of elements to be used may be determined by the heat required, also switches designed to regulate the amount of current to each element may be employed. In this manner any desired degree of heat may be obtained.

While the preferred embodiment of our invention has been here shown and described it is of course to be understood that alterations in details of construction and arrangement of parts as come within the scope of the claims for novelty may be made.

WVhat we claim is V 1. In an electric furnace, the combination with a casing having an air inlet and outlets arranged at opposite ends respectively thereof and means for forcing air through said casing, of an intermediate heating chamber, said chamber comprising a pair of reticulated walls transversely arranged in spaced relation to each other between said inlet and outlets, and a plurality of heating elements removably supported around the. inner face of said casing within said heating chamber.

2. In an electric furnace, the combination with a casing having an air inlet and outlets arranged at opposite ends respectively thereof and means for forcing air through said casing, of an intermediate heating chamber comprising a pair of reticulated walls transversely arranged in spaced relation to each other between said inlet and outlets, a plurality of heating elements removably supported around the innerrface of said casing within said heating chamber, and operating means in relation with one of said reticulated walls extending through the wall of said casing to control the flow of air to said heating chamber. I

Signed at Toronto, Ontario, this 7 th day of November, 1930. I

' ELIGIO' RUBINI.

JOHN DE LAI. 

